diff --git a/core/modules/system/lib/Drupal/system/Tests/Theme/ThemeTestPhpTemplate.php b/core/modules/system/lib/Drupal/system/Tests/Theme/ThemeTestPhpTemplate.php
index ff3fd03..35f08f5 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Theme/ThemeTestPhpTemplate.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Theme/ThemeTestPhpTemplate.php
@@ -42,7 +42,7 @@ function testTemplateOverride() {
       ->set('default', 'test_theme_phptemplate')
       ->save();
     $this->drupalGet('theme-test/template-test');
-    $this->assertText('Success: Template overridden.', t('Template overridden by defined \'template\' filename.'));
+    $this->assertText('Success: Template overridden with PHPTemplate theme.', t('Template overridden by PHPTemplate file.'));
   }
 
 }
diff --git a/core/modules/system/tests/themes/test_theme_phptemplate/theme_test.template_test.tpl.php b/core/modules/system/tests/themes/test_theme_phptemplate/theme_test.template_test.tpl.php
index ada11e7..86ef138 100644
--- a/core/modules/system/tests/themes/test_theme_phptemplate/theme_test.template_test.tpl.php
+++ b/core/modules/system/tests/themes/test_theme_phptemplate/theme_test.template_test.tpl.php
@@ -1,2 +1,2 @@
 <!-- Output for Theme API test -->
-<?php print 'Success: Template overridden.'; ?>
+<?php print 'Success: Template overridden with PHPTemplate theme.'; ?>